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"If someone infected with coronavirus coughs and walks away and someone else nearby comes over, aerosol particles containing the virus could end up in the other person's respiratory tract," Prof Ville says.

In a statement accompanying the video, the researchers said: "Preliminary results indicate that aerosol particles carrying the virus can remain in the air longer than was originally thought, so it is important to avoid busy public indoor spaces.

"This also reduces the risk of droplet infection, which remains the main path of transmission for coronavirus."

Stay home if you have symptoms and cough into your arm rather than your hand (Image: Getty Images/Science Photo Library RF)